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REVIEW: Y-Box-Binding Protein 1 (YB-1) and Its Functions

I. A. Eliseeva, E. R. Kim, S. G. Guryanov, L. P. Ovchinnikov*, and D. N. Lyabin

Institute of Protein Research, Russian Academy of Sciences, 142290 Pushchino, Moscow Region, Russia; E-mail: ovchinn@vega.protres.ru

* To whom correspondence should be addressed.

Received April 8, 2011; Revision received May 6, 2011
This review describes the structure and functions of Y-box binding protein 1 (YB-1) and its homologs. Interactions of YB-1 with DNA, mRNAs, and proteins are considered. Data on the participation of YB-1 in DNA reparation and transcription, mRNA splicing and translation are systematized. Results on interactions of YB-1 with cytoskeleton components and its possible role in mRNA localization are discussed. Data on intracellular distribution of YB-1, its redistribution between the nucleus and the cytoplasm, and its secretion and extracellular functions are summarized. The effect of YB-1 on cell differentiation, its involvement in extra- and intracellular signaling pathways, and its role in early embryogenesis are described. The mechanisms of regulation of YB-1 expression in the cell are presented. Special attention is paid to the involvement of YB-1 in oncogenic cell transformation, multiple drug resistance, and dissemination of tumors. Both the oncogenic and antioncogenic activities of YB-1 are reviewed. The potential use of YB-1 in diagnostics and therapy as an early cancer marker and a molecular target is discussed.
KEY WORDS: YB-1, Y-box binding proteins, regulation of gene expression, DNA repair, transcription, translation, oncogenesis, oncomarker, multidrug resistance, metastasis

DOI: 10.1134/S0006297911130049